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Name: A local police department near a large mall has decided to step up tra
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Description: A local police department near a large mall has decided to step up traffic enforcement during the months of November and December this year. They are concerned that the number of people speeding has increased this year. The number of speeding violati

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A local police department near a large mall has decided to step up traffic enforcement during the months of November and December this year. They are concerned that the number of people speeding has increased this year. The number of speeding violations for 11 randomly selected days was recorded. Here are the results for those 11 randomly selected days.

13 8 10 10 4 17 9 16 10 12 12

a. Construct a 90% confidence interval for μμ = the true mean number of speeding violations given out daily during the months of November and December.

b. Interpret the confidence interval.

c. Last year, the police department gave out an average of 8.4 speeding tickets daily. Does it appear as if more speeding tickets were given out this year?

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